If you are new to Search Engine Optimization, you can read what Google engineers suggests you to do, to improve your website ranking. The guide is made for all webmasters of all levels and for sites of any kind, so it will definitely fit your case.

Read more on their Webmaster Central Blog or download the PDF file directly.

Remember that optimizing your site will bring you more free traffic.. which means more earnings if you advertise on your site!

Good luck!